Ditto! I feel like one of my belief systems has been shattered. I told my students a long time ago that pluto was a planet. I was teaching preschool…and then I find out that Pluto isn’t even a planet. That’s what I grew up learning. 
I even had a mnemonic device to help remember the “9” planets in order. “My Very Energetic Mother Just Served Us Nine Pizzas.” And now there’s no pizza to serve!
Now it might as well be: “My Very Energetic Mother Just Served Us…Nothing” Sigh
There was a time when the mention of Pluto conjured up 2 images in my mind…one of them being a distant icy “PLANET.”
But now…when I hear the word “Pluto”…I’m left with just one image…an orange colored mutt.